Finding the Fourth Proportional to 521,504.10, 731,155.50 and 521,504.10

Step by Step Solution

1. Step 1: Write the proportion equation
   521,504.10 : 731,155.50 = 521,504.10 : x
2. Step 2: Convert to fraction form
   521,504.10/731,155.50 = 521,504.10/x
3. Step 3: Cross multiply
   521,504.10x = 731,155.50 × 521,504.10
4. Step 4: Simplify right side
   521,504.10x = 381,300,590,987.55
5. Step 5: Solve for x
   x = 381,300,590,987.55/521,504.10
6. Step 6: Final answer
   x = 731,155.50